ok guys i am finally back. my 1994 5.0 has a 4r70w trans and when i drive it it runs great. then i go to hit the gas and nothing just idle then while i am still on the gas it surges up to where it should be in compersing to where i am in the throttle. i replaced the tps and it ran great for about a month now doing the same thing again when i do the koeo test all i get is the 539 code operator error a/c on ( but it is off) i am stumped it is in fail safe mode because my mpg went way down. any thoughts maybe the map? iac? ats? i am lost and dont know where to turn. anything is great. thanks